<!DOCTYPE html>
<html>
<head>
<style type="text/css">

.ex {
   display: block;
   -webkit-filter: opacity(25%);
   -moz-filter: opacity(25%);
   filter: opacity(25%);
}

</style>
</head>
<body>
  <img class="ex" src="rust-0.png">
</body>
</html>
